Artificial hand or tool-holding attachment for amputated arms.



D. W; DORRANGE. ARTIFICIAL HAND OR TOOL HOLDING ATTACHMENT FOR AMPUTATED ARMS.

APPLICATION FILED SEPT, 10, 1909.

Patented 5, 1919.

4 I l J that l, n citizen the United States dent the city of Portland, in of Multnomah, State of Gregor], have invented a new and us he county in] lmnrovement in Artificial Hands or 'lool "i iding {attachments for Amputated Armani which the following is a specification, reference being had to the accompanying drawings as con stituting a part thereof.

This invention has for its object to obtain a gripping device adapted to be fixed to an arm stump, serving as the hand thereof, and which is adapted to hold an implement such as a fork, knife, or working tool.

It is further my object to make such device simple oi construction and easily adjusted; and to that end my invention embodies the specified features hereinafter more fully set forth.

In the drawings: Figured is an elevation of my artificial hand; Fig. 2 is a top view with parts in section; Fig. 3 is an enlarged front end view with the socket part of my device omitted; Fig. 4 shows my device embodied in the form of a human hand; and Fig. 5 an enlarged. end view of the socket part of my device, more clearly.illustratingthe construction of the same.

, Referring in the first instance to the construct-ion of device as illustrated in l and 2: lily device comprises a. socket a, provided with a head plate [3, having a threaded perforation in which to receive the threaded shank (Z, ecting rom boss, (5 of the semi-global; l ietween the abutting parts is i placed a. Washer 0, of resilient mat as rubber. The sockete is made Wl oi splits e radiating from the center or dering the socket 1 j '1 one of the split the socket eds afliiied a band .f projecting ear-portions f, 7, one of vidcd ivith a. threaded stud g,

s through the registering perforation oi the other car and on such stud g, is

wing nut 2.. which the cars 7"". f, and 'tllQlQflllil the portions of the socket c, are dis rn i so as to clamp in place the ball 'i, Wl;

21% rotatable in the socket c. To lighten weight, the ball is made hollow and pr ted, 2 1 i vided with the .nuegz central sha k nter end c nrovided a hers hingeu 7 together, one thereof provided with a pivoted, threaded pin, Z, projecting through a registering perforation of the companion men'iber, and on which threaded pin is a wing nut, m, for adjusting the movable member ofthe clamp device. The opposed faces of the clamping eontrivnnce is, are provided with concm'ities n and 0,-011e larger than the other, in which to insert thc implement that is to be held loy my device. The ball 2', being rotatable in the socket 6, permits the adjustment of the clamping contrivnnce 7: to any position convenient for holding the implementto he used.

in Fig. i l: have illustrated my device as combined with, or embodied, as it were, in an artificial form of a human hand. The construction of the parts is just the same as above described and the parts have been lettered accordingly. The screw shank d, in this instance. instead of being inserted in the head plate 5 of the socket a, is inserted in the palm of the hand form. the latter being made with a threaded hole, p, to receive said screw shank. s

The socket a. is provided with straps {1, arranged as convenient for securin such socket on the arm stump in the usua mannor.

l claim:

1. An artificial hand comprising a device adapted to be attached to the amputated arm, a sei'ni-globular compressible socket attired to said attaching device, means for compressing the socket, a ball rotatable in the socket; a shank projecting from the ball, and a clamp on the extremity of the shank.

2. inn artificial hand comprising, a device adapted to be attached to the amputated arm, a semi-globular compressible socket ailixed to said attaching device, means for compressing the socket; a ball rotatable in the socket, a tangential shank projecting from the ball, a clamp on the extremity of the shank, and said clamp consisting of a member rigid on the end of the shank, an opposed member hinged thereto, and means for tightening the hinged member upon the fixed member of the clamp, the opposed :t'aces of clamp heing provided with a recess or recesses.

3. An artificial hand comprising, a device slanted to be ed to the amputated arm, a scmi-glohn a: split socket adapted socket; a bail rotatable in the socket a eeasei a hail retatahie in the socket, a shank prethe 'sccket and attached thereto, said bands jecting from the hall, anda dampen the extremity of the shank.

4. An artificial hand compnsmg', a device adapted to be attached to the amnuteted arm,

a semi-giobuiai split socket'adayted to he compressed, affixed to said attachinp' device, a band encompassing the mouth of the socket and attached thereto, means for tightening the ends of said bands tocompress the shank projecting from the hall, and a clamp on the extremity of the shank.

5. Ln artificial hand compnsmga device adapted to he attizched to the amputated arm, a semi-globular split socket adapted to be compressed, aflixed to said attaching device; a hand encompasslng the mouth of having projecting ear ortions, means for clamping said ear-portions together so as te compress the seeket, a ball rotatable in the seeket'; a tangential shank projecting from the hall, a clamp on the extremity of the shank; and said clamp consisting of a member rigid on the end ot' the shank, an opposed member hinged theceto, and means for tightening the hinged member, upon the fixed member of the clamp, the opposed faces of said clamp being provided Wither recess or recesses.

DAVID W. DORRANCE.

Witnesses:

ELLA J. HAYS, JOHN Seems. 

